Perpendicular plate of ethmoid bone

The perpendicular plate of the ethmoid bone (vertical plate) is a thin, flattened lamina, polygonal in form, which descends from the under surface of the cribriform plate, and assists in forming the septum of the nose; it is generally deflected a little to one or other side. The anterior border articulates with the spine of the frontal bone and the crest of the nasal bones.

Perpendicular plate of ethmoid bone
Perpendicular plate of ethmoid. Shown by removing the right labyrinth.
Ethmoid bone from behind.
Details
Identifiers
Latin	lamina perpendicularis ossis ethmoidalis
TA98	A02.1.07.006
TA2	726
FMA	52891
Anatomical terms of bone [edit on Wikidata]

The posterior border articulates by its upper half with the sphenoidal crest, by its lower with the vomer.

The inferior border is thicker than the posterior, and serves for the attachment of the septal nasal cartilage of the nose.

The surfaces of the plate are smooth, except above, where numerous grooves and canals are seen; these lead from the medial foramina on the cribriform plate and lodge filaments of the olfactory nerves.